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    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>系好安全带,准备启航</title>

    <script type="text/javascript">

        //通过javascript的日期对象来得到当前的日期，并输出。
        var mydate = new Date(),
            year = mydate.getFullYear(),
            month = mydate.getMonth() + 1,
            day = mydate.getDate(),
            weeknum = mydate.getDay(),
            weekday = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];
        document.write(year + "年" + month + "月" + day + "日" + "&nbsp" + weekday[weeknum]);


        //成绩是一长窜的字符串不好处理，找规律后分割放到数组里更好操作哦
        var scoreStr = "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76",
            scoreArr = scoreStr.split(";"),
            scoreAver = 0;
        for (var i = 0; i < scoreArr.length; i++) {
            scoreAver += parseInt(scoreArr[i].substr(-2));

        }

        document.write("--班级总分为:");
        //从数组中将成绩撮出来，然后求和取整，并输出\
        scoreAver /= scoreArr.length;
        document.write(scoreAver + "&nbsp");
        //document.write(Math.round(scoreAver)+"&nbsp");


    </script>
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<body>
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